16) 31-12-2018 – Due date of GST ITC-04 for the period of July 2017 to September 2018

17) 31-12-2018 – Taxpayers whose registration has been cancelled by the proper officer on or before September 30, 2018, shall be required to furnish the final return in Form GSTR-10 till December 31, 2018.

18) RFD-10:- Eighteen months after end of the quarter for which refund is to be claimed